He Min, Zhang Zutai, Zheng Dongxiang, Ding Ning, Liu Yan
Beijing Institute of Dental Research, Capital Medical University School of Stomatology, Beijing Stomatological Hospital.
Dent Mater J. 2014;33(6):778-85. doi: 10.4012/dmj.2014-002. Epub 2014 Oct 11.
This study aims to investigate the effect of sandblasting on the surface roughness of zirconia and the shear bond strength of the veneering porcelain. Pre-sintered zirconia plates were prepared and divided into four groups. Group A were not treated at all; group B were first sandblasted under 0.2 MPa pressure and then densely sintered; group C and D were sintered first, and then sandblasted under 0.2 MPa and 0.4 MPa pressures respectively. Surface roughness was measured and 3D roughness was reconstructed for the specimens, which were also analyzed with X-ray diffractometry. Finally after veneering porcelain sintering, shear bond tests were conducted. Sandblasting zirconia before sintering significantly increased surface roughness and the shear bond strength between zirconia and veneering porcelain (p<0.05). Sandblasting zirconia before sintering is a useful method to increase surface roughness and could successfully improve the bonding strength of veneering porcelain.
本研究旨在探讨喷砂处理对氧化锆表面粗糙度及饰面瓷剪切粘结强度的影响。制备预烧结氧化锆板并分为四组。A组未作任何处理；B组先在0.2MPa压力下进行喷砂处理，然后进行致密烧结；C组和D组先进行烧结，然后分别在0.2MPa和0.4MPa压力下进行喷砂处理。测量了试样的表面粗糙度并重建了三维粗糙度，还用X射线衍射仪进行了分析。最后在饰面瓷烧结后进行了剪切粘结试验。烧结前对氧化锆进行喷砂处理显著增加了表面粗糙度以及氧化锆与饰面瓷之间的剪切粘结强度（p<0.05）。烧结前对氧化锆进行喷砂处理是增加表面粗糙度的一种有效方法，并且能够成功提高饰面瓷的粘结强度。
